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Silicone Caulk vs. Plumber’s Putty: Choosing the Right Sealant for Your Plumbing Needs in New York

By Expert at Plumbing Services LLC 1/17/2026
Silicone caulk and plumber's putty are two commonly used sealants in plumbing. Silicone caulk is flexible, waterproof, and durable, while plumber's putty is rigid and can dry out over time. Choosing the right sealant depends on the specific plumbing application. For sealing joints and gaps in plumbing fixtures, silicone caulk is the better choice. For sealing threaded connections, plumber's putty is the better option. At Plumbing Services LLC, we offer a range of plumbing services, including smart plumbing system installation, plumbing permit assistance, and eco-friendly plumbing services. Contact us today to learn more about our services and to schedule an appointment in New Dorp.

When it comes to plumbing, having the right sealants is crucial to prevent leaks and ensure a smooth flow of water. Two of the most commonly used sealants are silicone caulk and plumber's putty. But which one should you use? In this article, we'll explore the differences between silicone caulk and plumber's putty, and help you decide which one is best for your plumbing needs in New York.

What is Silicone Caulk?

Silicone caulk is a type of sealant that is made from a flexible, rubber-like material. It is commonly used to seal joints and gaps in plumbing fixtures, such as sinks, toilets, and faucets. Silicone caulk is waterproof, flexible, and can withstand extreme temperatures, making it an ideal choice for plumbing applications. For example, if you're looking to install a new appliance in your home, silicone caulk can be used to seal the connections and prevent leaks.

What is Plumber's Putty?

Plumber's putty, on the other hand, is a type of sealant that is made from a mixture of clay and oil. It is commonly used to seal threaded connections, such as those found in faucets and toilets. Plumber's putty is easy to apply and can be molded to fit into small spaces, making it a popular choice among plumbers. However, it is not as flexible as silicone caulk and can dry out over time, leading to leaks. If you're experiencing leaks in your plumbing system, our plumbing permit assistance services can help you identify the source of the problem and obtain the necessary permits to make repairs.

Key Differences Between Silicone Caulk and Plumber's Putty

Here are some key differences between silicone caulk and plumber's putty:

  • Silicone caulk is more flexible and can withstand extreme temperatures, while plumber's putty is more rigid and can dry out over time.
  • Silicone caulk is waterproof, while plumber's putty is not.
  • Silicone caulk is more durable and can last for many years, while plumber's putty may need to be reapplied periodically.

In addition to choosing the right sealant, it's also important to consider the environmental impact of your plumbing choices. At Plumbing Services LLC, we offer eco-friendly plumbing services that can help reduce your water consumption and lower your energy bills. We also provide high-efficiency plumbing upgrades that can help you save money and reduce your environmental footprint.

When to Use Each

So, when should you use silicone caulk and when should you use plumber's putty? Here are some general guidelines:

  • Use silicone caulk for sealing joints and gaps in plumbing fixtures, such as sinks, toilets, and faucets.
  • Use plumber's putty for sealing threaded connections, such as those found in faucets and toilets.

For more information on how to use silicone caulk and plumber's putty, check out our guide to deep cleaning a jetted tub. You can also learn more about why copper pipes turn green and how to prevent Legionella in your plumbing system.

If you're looking for a smart plumbing system installation in New Dorp, our team of experts at Plumbing Services LLC can help. We serve the entire New Dorp area and offer a range of plumbing services to meet your needs. Contact us today at (866) 203 8438 to schedule an appointment and let us help you choose the right sealant for your plumbing needs.

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